Many Arsenal fans were impressed with one thing saw David Raya do against Crystal Palace. David Raya is now the established first-choice goalkeeper at Arsenal, with Aaron Ramsdale something of an outcast figure at the club these days. This changing of the guard between the sticks has been one of the most contentious issues at Arsenal this season. Ramsdale remains a fan favourite at the Emirates Stadium, and Mikel Arteta has come under fire for his treatment of the England man. However, Raya is clearly the Spanish coach’s preferred picked. For all of Arteta’s talk of regularly rotating his goal…